Violin-bow screw.



W. R. GRATZ. VIOLINBOW SCREW. APPLIOATION FILED JAN. 7, 190a.

937,5 1 8. Patented Oct. 19, 1909.

WILLIAM GRATZ, 033 NEW YORK, N. Y.

VIOLIN-BOW SCREW..

Specification of Letters Patent.

- Application filed January '2, 1908. Serial. No. 4.09,?14.

Be it known that I, WILLIAM R. GRATZ, a citizen of the UnitedStates,.residing in New York, in the borough of Brooklyn, county ofKings, and State of New York, have invented certain new and usefulImprovements in Violin- 30w Screws, of which the following is aspecification.

This invention relates to an improved adjust-ing screw for the bows ofviolins, Violas,

violoncellos,'double basses and other stringed instrul'nents. v

The adjusting-screws for violin-bows are provided with buttons which areapplied to thc:stems of the adjusting-screws-and which are ornamented byan exterior shell formed of hard rubber, silver, mother ofpearl, ebony,and other materials. The button frequently, after continued use, getsloose from the stem of the adjusting-screw, so that it could be turnedfreely around the stem Without tightening the bow, while the ornamentalportions of the shellbecome loose and detached so as to impair theappearance of the button-end of the screw.

Theobjeot of this invention is to obviate the objections referred. toand to furnish a button for the adjusting-screws of violinbows which ispermanently attached by a cap to the end of the stem of theadjustingscrew and provided with a non-detachable ornamental shell, saidcap being riveted to the end of the stem, as will be fully describedhereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a perspective view ofa violinbow with my improved adj ustingsorew, Fig. 2 is a side-elevationof the adjusting-screw as detached from the bow, and Fig. 3 is aside'elevation of the bow-screw partlyin section through the button ofthe same.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, or represents the fro of a violin-bow, htheend of the bow adjacent to the frog, and d the adjusting-screw for thebow by which the tension of the hairs of the bow is adjusted. The ad'ustin -screw 05 on e es in the usual man- .l a: 5

nor a stud on the frog so as to adjust the end I) of the how. The adjusting-screw d is provided with a stem d to which is attached anornamental button 6, the core of said ornamental button being made. ofsuitable ma terial, such as wood, hard rubber, ebony, etc and ornamentedby a shell 6 formed (if-trimmings of silver or other sheet-metal,mother-of-pearl and the like, which are placed around the polygonal orother core of the button. To theend of the=button e is applied a capewhich fits snugly over and conforms to the button and is riveted to theend of the stem d of the adjusting-screw, so as to hold the buttonrigidly on the end of the stem without getting loose on the same andpermitting it to turn without turning the screw; The detaching of thebutton from the stem d as well as the detaching and loss of theornamented portions of the shell are also prevented by the end-cap 0 Avery attractive and permanent button for the ad justing of violin-bowsis thereby obtained and the objectionable features of the buttonsheretofore in use entirely obviated.

Having thus described my invention, I

Patented (bot, 19, 1969,

claim as new and desire to secure by Letters Patent 1. In a violin-bow,the combination with its adjusting screw having a stem, of a but tonplaced on the stem of said screw, and a cap fitting snugly over andconforming to said button atflone end of the latter and fastened to theendof the stem.

2. In a violin-bow, the combination with its adjusting screw having astem, of a cap so fastened as to be rigid with the end of the stem ofthe adjusting-screw and to form a part thereof.

3. In a violin-bow, its adjusting screw button placed on the stem of thescrew for turning it, of a cap on the end of the stem of the screw,enveloping one end of the button, extending inwardly over a part of thebutton from the end of the stem, fitting snugly over that part andsubstantially conforming to the contour thereof.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

WM. R. GRATZ.

the combination with having a stem and its

